hey, how's it going, bought 3/4 of a gallon of valu-pro clear and 3/4 of a can of clear hardner, how good is the valu-pro multi purpose clear? also It says on the hardner to use intire contents with n 14 days? well I bought the stuff about 1 month ago, so they both have been open for about 5 weeks now, will it make any diffrence, or should i buy a new can of clear hardner? thanks.